Question

Mrs. Burleson surveyed the students in her class to find the number of minutes they spent doing homework each night. she found that the data was normally distributed with U=30 and O=10.what Range of time spent doing homework contains 68% closer to the mean?

Answer 1

Ok, so:

We know that the data was normally distributed with U = 30 and O = 10, then:

The desviation will be between 20 and 40 minutes.

This is because the range must contain 68% closer to the mean, and the mean between these two dates is 20, and the maximum is 40.